What was the purpose of the Akeda?
Most of the mefarshim explain the Akeda as some kind of test of Avraham's emuna in Hashem. The Rashbam however, has a very different fascinating pshat which is very relevant to events in Eretz Yisrael.
The Rashbam says that whenever the Torah uses the phrase ויהי אחרי הדברים האלה it is referring back to what just happened (he brings numerous examples). Here also the Rashbam says, the Akeda is a reaction to what just happened, Avraham's treaty with Avimelech. Hashem was angry with Avraham for making a treaty with Avimelech and giving away part of Eretz Yisrael which Hashem had just promised to Avraham. Avraham made the treaty to protect his son. Therefore Hashem told him, go bring your son as a korban and see if your treaty protects him. Hashem's message is clear, he tells Avraham, all you need is to have faith in me, I will protect Yitzchak and his descendents and I and only I,will ensure that the Jewish People inherit EY. Nothing else (treaties, Presidents, etc.) can protect the Jewish People and EY except for Hashem.